Sand-blast apparatus



July 1?, 1923.

E. J. MOORE ET AL SAND BLAST APPARATUS Filed NOV. 14, 1918 4 Sheets-Sheet l,

E. J. MOORE ET AL SAND BLAST APPARATUS Filed Nov. 14 1918 4 Sheeis-Sheet 2 JuHy 1?, 1923.

E. J. MOORE ET AL SAND BLAST APPARATUS Filed Nov. 14, 1918 4 Sheets-Sheet 5 July 17, 1923.

. E. J. MOORE ET AL SAND BLAST APPARATUS Fiied Nov. 14,

4 Sheets-Sheet 4 l ntent dale it, 1%. I g

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- hill dust, the sediment removed W 3'. EUOBE AND EAOND H. MOORE,

W. W. SLY AGTUBING CO @KON @E' @O.

or on r I "a o are re @p a lie A .tti

snnn-nitr arm.

Application filed fiovember 1 1, late. aerial lilo.

To all whom it may concern:

which the followin is a 'full, c ear, and ex-.

act description, re erence being had to the accompanying drawings.

This invention relates to sand blast apparatus, and more particularly to apparatus of the type wherein sandblast guns are used in conjunction with a rotary tumbling barrel for the puse of cleaning castings contained therein. The following general objects will be realized by our invention:- providin an apparatus of. this character whichwl 1 enable the castings or other articles in such barrels to be cleaned in a particularly eflicient manner; providing in such ;.paratus means for conveniently adjusting t blast guns with reference to the barrel and the work therein; providing an eficient door for the barrels of such apparatus; means whereby the sand may be cleaned of the ole sand be used repeatedly. Further and more limited objects of the invention will a ar hereinafter and will be realized in an t rough the combinations of elements embodied. in the rum and ir -"u? in the drags, wherein: Fig. l'represents a view, partly in longitudinal section and partly in side elevation, of an apparatus constructed in accordance with our invenx 2 an end elevation of such apparatus; 3 a transverse sectional view correspo ing to the line 3-3 of 'llig. 1;

Fig. t a sectional view corresponding to the line of Fig. 3; Fig. 5 a similar view correondi to the line 5-5 of Fig. 2; Fig. 8 enarged sectional detail throuh the fanin and supporting means for te barrel doorig. 7 an elevation of the arts shown in ll ig. 6; Fig. 8 a sectional etail ponding to the line 8-8 of Fig. 6; Figs. 9 and 10 sectional views coponding respectively to the linw 9-9 and 10-10 of Fig. 1; Fig. .1 a. sectional view correonding to the line 11-11 of Fig 9; and lg. 12 asectional view corondmg to the line 12-12 of Fig. 1.

' Dribing the parts by "reference a. 1

and providing in such apparatus 12 therefrom, and.

ters, 1 denotes a housing, p mferably rectante upr central portion thereof with an exhaust flue 2 leadin to a dust arrester (not sho). This housing and the parts associated therewith'are supported by a suitable framework comprising the uprights 3 and 4:.v The opposite ends of the housing are open for the reception andoperation of the sand blast ns and the various parts for operating t e mill. The central portion of the housmg is substantially closed by means of transverse "partitions 5, said partitions having each a central circular opening for the bull rings 6, the bull ring at the right hand end of Fig. 1 having'a' lar e ar 7 connected thereto and both of the ad ri being supported on rollers 8. Four such rollers are shown, two within each end of the housing. Three of these rollers are mounted on short shafts 9 shown as mounted in split bearings 10 suitabl' su ported from the brackets 3. The tou rol or (see Figs, 1, 2 and 5) is mounted on a shaft 11 he rotatably mounted then a pinion .=*-ngjwith and driving the gear 7. The hub of the pinion 12 is shown as extended and has keyed thereupon "a gear 13 meshing with a pinion It on the pulley shaft 15, the last mentioned-shaft being provided with the usual fast and loose pulleys 16 and 17. v

The hull r25 rt, throh inwardl directed annuar d lilo ntril: rings 18, an inclined cylindrical indicated generally at 19, said ri bein conveniently secured to the hds 20 cl 1? harrel. Each of these he is with an opening 21. The centers oil the onin 21 coincide with the axis of rotation of said barrel, which, because of the in.

clination of the barrel, makes an angle'with the longitudinal cent axis of the loci.

In Fig. 1 one of these is shown as above and the other beowte axis of the barrel. c axis about which the bull r d the barrel rotate is horizontal.

fiplar in transverse section, and provided at til) lid

The bar is provi with a door, indi- I cat/ed generally at 22. II lad is it l of the dand'its lar in plan and the si opening extend lotudinally oil rel suantiall the n w the heads $0. si of e door d its is bevel,zas indid at r i s gen-r 3 "an 7. e door lsplvo on an lltld llltl axis arallel to the edge of the door opening and ohated near one side of the latter but within such opening. This axis is provided by means of a pair of stud shafts 23 projectfromeach end of the door parallel with, ad acent to and equidistant from one of the si e edges of the same, said shafts being supported in journals 24 carried by the body of the barrel adjacent each end thereof. Both of these shafts are provided with means for locking the door in open and closed position. This means comprises a locking disk 25 rigid with each of the shafts 23 and having the peripheral notches 26 therein. Coopcrating with said disk is a locking pawl 27 keyed to a shaft 28 which is mounted in a journal 29 which may convenlently form an extensionof the journal 24. Mounted on indicated at 35. The disk 31 is adjustably connected to the shaft 28 by means of a pin 36 and a plurality of apertures 37 in said ,dislz, adjacent to the lag screw 30. By applying a wrench to the notches 32 after hav ing withdrawn the pin 36, the disk may be rotat/ed in an ap ropriate direction to adjust the torsion of thespring 34 and thereby nsure the eflicientoperatipn of the pawl 27 by said spring. By operating the pawl handle,

from the locking notch of the disk 25, permitting' the door to swing inward by grav ty to the station shown in dotted lines in Fig. 7, when the detent 29 is pressed into the notch'26 which will hold it in such position. As the barrel continues its rotation, the door will assume the positions shown in dotted lines in Fig". 3, being in position to expose the full width of the door opening by the time the latter reaches the bottom osit1on. At this time, the door forms a shed ing surface for discharging the castings, one surface of the door engaging an edge of the o ning. Further rotation of the mill br ngs to door opening in position for loading. After the loading operation, the door may be closed and may be locked in closed os1-- tion bymeans of the detent 29 an the apropriate notch in the dISk 25.

order to ermit the loadm of the barrel, the part 0 the housing enc osed by and between the partitions 5 is provided with a pair of doors 38,. each hinged adjacent to 7 one of the-partitions 39,

Fig. 1. Ex-

' din longitudinally of the enclosure profloor plates 40, which extend from each side wall of the housing to the adjacent side edgeconducted through the exhaust connection 2, thereby to remove from the sand dis-n charged through the perforations in said barrel any dust that may be present therein.

This dust can be collected 1n any suitable dust arrester with which the exhaust 2 may communicate. The enclosure for the barrel- 20 insures the proper delivery of the sand down the inclined floor plates 40 and into the collecting mechanism therefor, which will now be described.

The collecting mechanism comprises a pair of hoppers 43 shownns supported by tangle irons 44 carrying rollers 45 mounted on rails 46. Four such rollers are shown, two at each end of the hopper carriage. Abpve each hopper is a downwardl inclined screen 47, shown as supported within the upper end of each hopper by. angle bars '48. Each screen is shown as provided with a pair of handles 49 by which it may be conveniently removed and any scale or sedimentcollect-ed thereu on may be conveniently removed, the si ed sand dropping into the hoppers and thence into discharge ducts 50, respec tively connected with flexible tubin 51 leading;to the sand blast guns 53. W0 such the detent 29 thereof may be disengaged g are shown, each adapted to discharge sand through an opening 21. into the barrel. These guns may be of the type shown in the appllcatlon of Edward J. oore and Raymond H. Moore. Serial No. 237,226, filed May29, 1918, and each is shown as rovided with an air pressure hose 54. Eac gun is mounted'in a manner which will secure a convenient and eliicient means for adjusting the same relatively to the barrel.

55 denotes an arm. the lower end of which is formed as a hub 55 pivoted upon a'hollow transversely split shaft 56 the two parts whereof are united by means of a bolt 57, one of the shaft sections being provided with projections 56 adapted to enter corres onding notches in the other section and eac section having a flange 56", 56,adapted, by the adjustment of the. late 57, to

. bear against opposite sides of t e hub 55.

The bolt is shown as provided with a head 58 having an operating handle 59', one of the shaft sections being provided with a stop 60 cooperating with said handle to prevent the latter from being thrust into the teeth of the ge 7. At its u per end, the arm 55 is provided with a ha 61. adapted to res n an in a j a in thaarp en masses;

bolt being threaded through an opening insaid head and there provided with a nut 68.

-Pivoted on the upper end of each tubular shaft 64 and secured thereto by means of clamping lugs 69, 69 and a bolt 7 0 (see Fig. 12) is a two-part clamp 71 in which the body of the sand blast gun is mounted.

By the construction of the parts supporting the sand blast guns, it will be evident that. they may each be swung in a vertical plane by the arm 55, that the effective lengths of the supporting arms for the guns may be varied through the tubular sha t 64 and the connections 61-68; that the guns may be rotated about the axis of the tubular shafts 64; and that they may be adjusted about the bolts as pivots. By these va rious adjustments, each of the guns-may be withdrawn from operative relation to and inserted within its opening 21 and may be positioned with reference to the barrel in such'manner as to insure the most efiiclent operation upon the contents thereof.

The carriage supporting the hoppers 43 and the parts associated with the hoppers ma. be moved along the rails 46 by means of a s aft 72 having sprockets 73 on opposllfi ends thereof and rovided at one end with an operating han le lever 74. Chains 75 connect the s rockets 73 with sprockets 76 on short sha ts 77; Each shaft 77 is provided with a sprocket 79 thereon, there being a chain 80 extending around said s rocket and a sprocket 81 on a shaft 82.

ne branch of the chain is connected with one end of the hopper carriage, as shown at -83-=-see Fig. 4. It will be understood that the parts 76-83 will be duplicated at the opposite end of thehopper carriage; where fore, by operating the handle lever 74: the hopper carriage may be moved into and out of register with the central longitudinal opening 41 in the bottom of the enclosure.

In operation, the doors 38 will be opened and the castings loaded into the barrel through the door 22. The guns will be. placed in proper relation to the openings 21 in the barrel head and the barrel rotated through the pulley 16 and the parts connected therewith. A light suction being maintained in the exhaust 2, air drawn through the slot 42-7Will remove dust from the sand falling through the openings in the barrel. The sand .will be discharged through the door opening 41 into the hoppers, the screens 47 removing" scale and other sediment. conducted to the guns and re-discha-rged into the barrel. When the cleaning 0 eration has been completed, the handle ever 74 is operated to withdraw the hoppers from beneath the central opening 41. A truck From the hoppers the sand is may be brought beneath such opening, the

barrel door 22 opened and, by rotation of the barrel, the castings will be discharged through the door opening and the openin 41.

t has been found that, by inclining thebarrel 19 and directing the blast through the guns in the manner shown, a rapid and cfiicient cleaning of the castings is accomplished and with a minimum consumption of sand.

The arrangement of the hopper carriage 1. In an apparatus of the character described, the combination of a perforated rotatable barrel and means forrotating the same, an enclosure for said barrel havin a discharge openingin the bottom thereo a hopper carriage movably supported beneath said opening, a pair ofhoppers on said carriage, a sand blast gun connected with each hopper and ada ted to conduct sand there-.

from to and disc arge the same into opposite ends of the barrel, and means for removing dust from the sand discharged through the barrel. 2. In an apparatus of the character described, the combination of a perforated rotatable barrel and means for rotating the same, an enclosure for said barrel having anopenm in the bottom thereof, a carriage rnovab y supported'beneath the opening in said enclosure, a pair of hoppers su ported by said carriage, a screen above each opper, a sand blast gun arranged to discharge into each end of said barrel, connections for su plying sand from said hoppers respective y to said guns, an exhaust connection leadin from the upper portion of said enclosure, and downwardly inclined walls extending from the sides of said enclosure to the bottom opening thereof. I

3. In an apparatus of the character described, the'combination of an enclosure having an outlet in the bottom thereof a perforated rotatable barrel in said enclosure, a hopper, a carriage on which said hopper is supported, rails beneathsaid enclosure on which said carriage is movably mounted,

not

-means for moving said carriage, a sand blast gun adapted to discharge into the barrel, and connections for supplying sand from said hopper to said gun.

4. In an apparatus of the character described, the combination of a rotatable perforated barrel, an arm pivoted adjacent each end or head of said barrel, a rotatable and longitudinally movable extension of said arm adjustably connected thereto, a sand blast gun carried by each such extension,.means for collecting sand discharged through the perforations in said barrel, and connections for supplying sand'from such collecting means to said guns.

5. In an apparatus of the character de-v scribed, the combination of a rotatableperforated'barrel, an arm pivoted adjacent to each end of said barrel, an extension for each of said arms longitudinally and rotatably connected thereto, a clamp rotatably' connected with each such extension, a sand blast gun meaaea 7; A cylindrical rotary barrel havin an opening therein, the side edges whereo extend substantially parallel to the length of said barrel, pivotal supports located inter mediate of and adjacent to one of such edges of the opening, a door mounted on said sup ports, and means for locking said door in closed position, the door being adapted by virtue of its pivotal mounting when unlocked, to open by gravity and to swing to a position to bring one side thereof ad acent to an edge of the barrel opening to form a shedding discharge with said opening.

8. An inclined cylindrical rotary barrel having an openin therein, the side edges whereof extend su stantially parallel to the length of said barrel, a pivotal support be-' yond each end. of said openin each of said pivotal supports being locate intermediate said side edgesof the opening and spaced from but located adjacent to one of said side edges, a door mounted on said supports, and

adapted to drop'by gravity toward and with an edge in substantial contact with the interior c lindrical wall of the barrel and form a shed ing surface for material within the barrel during rotation of said barrel, and means for locking said door in closed position.

In testimony whereof, we hereunto afix our signatures.

EDWARD J. MOORE. RAYMOND H. MOORE. 

